ASROCK X299 Extreme4 Manual Del Usuario página 18

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2.3 Installation of Memory Modules (DIMM)

This motherboard provides eight 288-pin DDR4 (Double Data Rate 4) DIMM slots, and

supports Quad Channel Memory Technology.

1. For quad channel configuration, you always need to install identical (the same

brand, speed, size and chip-type) DDR4 DIMM pairs.

2. It is not allowed to install a DDR, DDR2 or DDR3 memory module into a DDR4

slot; otherwise, this motherboard and DIMM may be damaged.

3. The DIMM only fits in one correct orientation. It will cause permanent damage to

the motherboard and the DIMM if you force the DIMM into the slot at incorrect

orientation.

Quad Channel Memory Configuration (For CPU with 44 or 28 PCIe lanes)

Priority

DDR4_B1

DDR4_B2

DDR4_A1

DDR4_A2

DDR4_D1

DDR4_D2

DDR4_C1

DDR4_C2

Dual Channel Memory Configuration (For CPU with 16 PCIe lanes)

Priority

DDR4_D1

DDR4_D2

DDR4_C1

DDR4_C2

• Due to Intel® CPU spec definition, please install the memory modules on DDR4_A1,

DDR4_B1, DDR4_C1 and DDR4_D1 for first priority. If the four DDR4 DIMM slots

above are fully installed, and you want to use more than four memory modules, please

install the other memory modules from left to right (from DDR4_A2, DDR4_B2,

DDR4_D2 to DDR4_C2.)

• If only two memory modules are installed in the DDR4 DIMM slots, then Dual

Channel Memory Technology is activated. If three memory modules are installed, then

Triple Channel Memory Technology is activated. If more than four memory modules

are installed in the DDR4 DIMM slots, then Quad Channel Memory Technology is

activated.

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